From: David Howells Subject: Re: [PATCH 0/6] Extended file stat system call Date: Thu, 26 Apr 2012 15:25:58 +0100 Message-ID: <20656.1335450358@redhat.com> References: <20120419140558.17272.74360.stgit@warthog.procyon.org.uk> Cc: dhowells@redhat.com, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-ext4@vger.kernel.org, wine-devel@winehq.org, kfm-devel@kde.org, nautilus-list@gnome.org, linux-api@vger.kernel.org, libc-alpha@sourceware.org To: Steve French Return-path: In-Reply-To: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org List-Id: linux-ext4.vger.kernel.org Steve French wrote: > Would it be better to make the stable vs volatile inode number an attribute > of the volume or something returned by the proposed xstat? I'm not sure what you mean by a stable vs a volatile inode number. > > Should things like the Windows Archive, Hidden and System bits be handled > > through IOC flags, perhaps expanded to 64-bits? > > Today I export these through an psuedo-xattr in cifs.ko, I am curious how > NTFS and FAT export these on linux. NTFS: Not at all. FAT: The hidden bit causes the filename to get a dot prepended (and nothing else is noted). > > Autofs, ntfs, btrfs, ... > > Given the overlap in optional attributes between the network > protocol and local NTFS (and ReFS and to a lesser extent FAT) > I would expect cifs.ko and the ntfs implementations > info to map pretty closely. Yep. I wasn't going to do more filesystems till we'd finished arguing about the basic arrangement of things in struct xstat. > > Handle remote filesystems being offline and indicate this with > > XSTAT_INFO_OFFLINE. > > You already have support for an indicator for offline files (HSM), HSM? > would XSTAT_INFO_OFFLINE be intended for the case > where the network session to the server is disconnected > (and in which you case the application does not want to reconnect)? Hmmm... Interesting question. Both NTFS and CIFS have an offline attribute (which is where I originally got this from) - but should I have a separate indicator to indicate the client can't access a server over a network (ie. we've gone to disconnected operation on this file)? E.g. should there be a XSTAT_INFO_DISCONNECTED too? David